If you saw someone eating a mars bar, would you go up to them and tell them that it might make them fat? As a conversation starter, with a colleague you barely knew?
Today, I had a colleague actually walk up to me, while outside of the office (public street essentially) and tell me that electric cigarettes have bad chemicals in....
Obviously I had mine in my hand at the time.
AIBU to be irritated at this? Sod off, I'm not hurting anyone and you walked ten meters over to me.
Why is acceptable for people to be rude and comment on this?